Indicate by check mark whether
the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form
20-F ☒ Form40-F ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ☐

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by
the undersigned, thereunto duly authorized.

BAIDU, INC.

By:

/s/ Jennifer Xinzhe Li

Name:

Jennifer Xinzhe Li

Title:

Chief Financial Officer

Date: June 29, 2017

Exhibit Index

Exhibit 99.1Press Release

EX-99.1

Exhibit 99.1

Baidu Announces Pricing of US$1.5 Billion Notes Offering

BEIJING, June 28, 2017 /PRNewswire/  Baidu, Inc. (NASDAQ: BIDU) (Baidu or the Company), the leading Chinese language
Internet search provider, today announced the pricing of its public offering of US$1.5 billion aggregate principal amount of its notes. The public offering consists of US$900 million of 2.875% notes due 2022 and US$600 million of
3.625% notes due 2027. The notes have been registered under the U.S. Securities Act of 1933, as amended, and are expected to be listed on the Singapore Exchange Securities Trading Limited.

The Company expects to receive net proceeds from the offering of approximately US$1.49 billion, after deducting underwriting discounts and commissions
and estimated offering expenses. The Company intends to use the net proceeds from the offering to repay existing indebtedness and for general corporate purposes.

The joint bookrunners of the offering are Goldman Sachs (Asia) L.L.C., J.P. Morgan Securities LLC and The Hongkong and Shanghai Banking Corporation Limited.

The Company has an effective shelf registration statement on Form F-3 (including a base prospectus) on file with
the U.S. Securities and Exchange
Commission (the SEC) and has filed a related preliminary prospectus supplement with the SEC for the offering of the notes. When available, the final prospectus supplement for the offering of the notes
will be filed with the SEC. The offering is being made only by means of the prospectus supplement and accompanying base prospectus. Before you invest, you should read the prospectus supplement and accompanying base prospectus and other documents
that the Company has filed with the SEC for more complete information about the Company and the offering. You may obtain these documents free of charge by visiting EDGAR on the SEC website at www.sec.gov. Alternatively, the Company or any
underwriter or dealer participating in the offering will arrange to send an investor the prospectus supplement and accompanying base prospectus if the investor makes such request by calling Goldman, Sachs & Co. toll-free at 1-866-471-2526, J.P. Morgan Securities LLC at 1-212-834-4533 or HSBC Securities (USA) Inc. toll-free at
1-866-811-8049.

This announcement
is not an offer of the securities for sale in the United States of America and shall not constitute an offer to sell or the solicitation of an offer to buy, nor shall there be any sale of, these securities in any state or jurisdiction in which such
offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction. The securities referred to herein have not been and will not be registered under the applicable
securities laws of any jurisdiction outside of the United States of America.

About Baidu

Baidu, Inc. is the leading Chinese language Internet search provider. Baidu aims to make a complicated world simpler for users and enterprises through
technology. Baidus ADSs trade on the NASDAQ Global Select Market under the symbol BIDU. Currently, ten ADSs represent one Class A ordinary share.

Safe Harbor Statement

This announcement contains forward-looking statements. These statements are made under the safe harbor provisions of the U.S. Private Securities
Litigation Reform Act of 1995. These forward-looking statements can be identified by terminology such as will, expects, anticipates, future, intends, plans,
believes, estimates, confident and similar statements. Among other things, the description of the proposed offering in this announcement contains forward-looking statements. Baidu may also make written or oral
forward-looking statements in its periodic reports to the SEC, in its annual report to shareholders, in press releases and other written materials and in oral statements made by its officers, directors or employees to third parties. Statements that
are not historical facts, including statements about Baidus beliefs and expectations, are forward-looking statements. Forward-looking statements involve inherent risks and uncertainties. A number of factors could cause actual results to differ
materially from those contained in any forward-looking statement, including but not limited to the following: Baidus proposed use of proceeds from the sale of debt securities; its growth strategies, its strategies for investing in and
acquiring complementary businesses and assets and its ability to execute these strategies; its future business development, including development of new products and services; its ability to attract and retain users and customers; competition in the
Chinese Internet search market; competition for online marketing customers; changes in Baidus revenues and certain cost or expense items as a percentage of its revenues; the outcome of ongoing, or any future, litigation or arbitration,
including those relating to intellectual property rights; the expected growth of the Chinese language Internet search market and the number of Internet and broadband users in China; Chinese governmental policies relating to the Internet and Internet
search providers and general economic conditions in China, Japan and elsewhere. Further information regarding these and other risks is included in Baidus annual report on Form 20-F, Form F-3 and other documents filed with the SEC. All information provided in this press release is as of the date of the press release, and Baidu undertakes no duty to update such information, except as required under
applicable law.